생명과학회지 (Journal of Life Science)

  • 제14권4호
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  • Pages.657-663
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  • 2004
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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고추의 sesquiterpene cyclase promoter-cinnamic acid 4-hydroxylase chimeric gene의 담배에서 발현

Expression of Cinnamic Acid 4-Hydroxylase Chimeric Gene fused with Sesquiterpene Cyclase Promoter from Hot Pepper in Tobacco

  • 이경민 (경북대학교 농업생명과학대학 식물생명과학부) ;
  • 윤용휘 (경북대학교 농업생명과학대학 식물생명과학) ;
  • 김길웅 (경북대학교 농업생명과학대학 식물생명과학) ;
  • 이인중 (경북대학교 농업생명과학대학 식물생명과학) ;
  • 신동현 (경북대학교 농업생명과학대학 식물생명과학부)
  • 발행 : 2004.08.01
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초록

고추에서 클로닝된 sesquiterpene cyclase (CASC) promoter에 cinnamic acid 4-hydroxylase (C4H)유전자를 클로닝하여 담배에 형질전환하였다. 형질전환체의 분석은 PCR, Southern blot분석으로 하였으며, CASC promoter의 작동여부를 조사하기 위하여 GUS histochemical assay를 하였다. 스트레스에 반응한다고 알려진 CASC promoter를 C4H gene과 fusion하여 C4H activity를 조사하여 스트레스에 반응하는 정도를 조사하였다. 최종적인 형질전환체로 확인된 개체는 평균 16.4% 정도였으며, 각 promoter별로 약간의 편차를 보였다. C4H activity 조사시 스트레스를 주지 않았을 때 대조구가 비슷한 양상을 나타내었다. 스트레스를 주었을 때 대조구와 비교하여 promoter 3번은 1.3배 activity가 높아졌으며 4번은 1.4배, 6은 2배, cyc 600은 1.1배 높아졌다. 이런 결과로 보아 이 promoter들은 UV에 반응하는 promoter이며 앞으로 stress에 저항하는 유전자의 적당한 promoter로, 타작물에 적용하여 stress저항성 작물의 육성 시 매우 유용하게 사용될 것으로 사료된다.

Tobacco transformants harboring cinnamic acid 4-hydroxylase gene (C4H) fused with susquiterpene cyclase promoter was developed in order to regulate biosynthesis of phenolic compounds by the expression of the introduced gene. Twenty transformants for each specific promoter were used to analyze the incorporation of the chimeric genes by PCR and Southern blot analysis. PCR products of NPTII(neomycin phosphotransferase) gene (553bp) were detected in the transgenic tobacco plants. The incorporation of the chimeric gene was confirmed in the Southern blot analysis. C4H activity in the transgenic plants was elevated by UV-irradiation and its level was higher compared to that of control plants.

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